Hello everyone, I hope you enjoyed the brilliant thought process behind Da Vinci's self-supporting bridge. I’d be grateful if you could support my channel today at www.patreon.com/Sabins. Your support is crucial to making our educational services sustainable. Wishing you a happy Diwali! Thanks Sabin Mathew
Hello Sabin, I love your channel and what you share. I'm a working Timber Wright and have built several of these types of bridges over the years. I've never been sure why they get called a "Da Vinci" bridge since the Chinese Scholar Lu Ban (魯班) was the first I've known of to employ a "stitch bridge" almost a thousand years before Da Vinci even lived. Some to these did span further and at a lower angle. Though made of stone, the Anji Bridge (安濟橋;) during construction employed these very same timber joinery systems and understanding, and still centuries before Da Vinci...Thanks again for what you and your team share and do with your videos...
@@AlbertaGeek What are you trying to say, that Da Vinci stole that idea for a bridge from Chinese? Even if there was such a thing in China that was unknown in Europe, so Da Vinci invented it (again).
@@ozymandiasultor9480 I would not say "stole", but more than silk travelled along the silk road. Knowledge travels, too you know. Could he have "invented" it independently? Sure, why not? After all, I did so myself, as a Cub Scout during the early 70s, going for my 'Building' badge. It was a popsicle stick bridge that I deduced from that popsicle stick construction that would explode when you flung it at something (or someone). Pardon my nostalgia.
As an assistant professor teaching engineering students, I love sharing your videos with my class and discussing them together. I can hardly describe the excitement it brings to the students!
Ohh no, it's a stable and rugged bridge. Our simple pencil bridge was able to carry more than 1 k.g of weight. The bridge had no problem, irrespective of the point or angle of load application. One thing is clear. This bridge will never fail because of the joint issue. More the force you apply the stronger the joints become. Yah, of couse if any of the members of this bridge fails, the entire bridge will collapse at once.
The Chinese built a bridge - using the same general idea of interlocking timbers - about 300 years before DaVinci was born. It was called the Rainbow bridge and it is an equally fascinating early engineering feat.
This is fascinating!✨ Exploring the genius behind its design is such a treat-his ability to merge functionality and beauty is unmatched. Thanks for taking us on this magical journey through history! 🔍🎨
Although da Vinci is often given credit for this, the Chinese Emperors were building bridges like this a good period prior; some of it had to do with seasonal flooding problems that often took out small to medium sized bridges- the Emperor kept an inventory of these parts, these logs, and shipped them to where ever they were needed. First they were erected , then spanned, followed by a more reasonably sloped on side and off side to anchor it and make it usable.
This type of simple practical thing are generally like this. Many other people also invented this but the one who introduce it better to rest of the world gets the credit Such as Pythagorean theorem Zero
I have known about this bridge for some time and have experimented with various iterations of it. Everyone looks upon it as an arch bridge and for that it is brilliant. One thing I tried, is to build it upside down i.e. an inverted arch. As an inverted arch it can be rocked on the arch provided that each end is kept loaded toward the ground. To a limited extent it can be used to lower a load over a gap. As a form of crane Extending it is easy and can be done very quickly as the outer end is held in place by gravity so no need to support. Limited by the strength of the first beams as the load on them increase exponentially if pivoted at or close to the end
Very interesting. This could be used for a number of interesting applications honestly. The only way I can see it used in it's bridge form to lengthen it besides using it in those manners would be to try to interlock them using maybe two half circles. I would have to test on smaller scale. It seems it has a lot of potential outside of bridge use though. For example, it seems it would be advantageous in survival scenarios to know how to create this bridge, or use cordage to create a full circle, turn it sideways, maybe stack a couple. It could give you a cylindrical shelter. There's a lot of potential with it. 😊
To be honest you're idea was good, all we need to do is to keep that in place by adding something to each joint or to the whole structure, to prevent it from being pushed by the current cover it in a net like cover to let the water pass through but keep the thing intact.
I work at a local brewery and we have a footbridge in the outdoor area. It is engineered in this manner and I marvel at it all the time. It does have fasteners and is solid, but same design.
I know a compromise solution to the last problem: suppose the issue is the weight the bridge would have to carry. We can put bars nailed together over the entire river that can carry at least one person at a time. The person goes on the unsupported Bars until it's about the middle of the River, then the person has to ram a support tower into the riverbed, from the upside of the bridge. Now you can bed two Da Vinci bridges onto the support in the middle of the river. Use strings to support the horizontal bars. How exactly you get the support into the middle of the River is of less importance, you could use a boat aswell, once it's there you can save on many supports by using two or more Da Vinci bridges.
2:46 All the weight you apply will be transferred onto the density of the red pencils. They can also not be pulled outwards due to being inside a triangle; as soon as any one is removed it comes apart.* Securitisation changes, in the office model the top piece is not in a triangle and spreads out the structure making a wider curve; also a lower bridge. Remember those basic shapes, 2D is Hexagon. good vid!
I think if we least use more heavy weight products like concrete or iron type with geometry shape might work as the water flow will not be able to cause that much pressure on it when flow increases.
on the last drawing, you could place two parallel arc bridges on the same direction as the river flow, and then place another 3 arc bridges connecting these 2 arcs and the shores.
Da Vinci born in 1452 - 1519 and this bridge is fantastic job. Please see China's Craftsman named Lu Ban. He born in 507 BC - 444 BC. He has a same creative self support bridge too.
0:12 incorrect. There is a threshold of weight at which the structure cannot longer support. It is not possible to put infinite weight on the structure. There is a point at which the weight will not only weaken, it will deconstruct the structure.
Actually the construction is one of the methods to build an arch. Stress of materials can be loaded in a) compression, b) tension, c) shear. Stone and other materials are usually strong against compression, and less strong against tension and shear. Half circle ach is designed in a way that materials are compressed, which make the construction very stable. The Leonardo self supporting bridge is excellent construction when building a stable bridge with least materials. Another method would require huge amount of woods, but we can also build classic arch out of woods, in which woods are just compressed. The construction would then far more stronger than Leonardo self supporting bridge, while it is also self supporting. (We cannot build stable circle, though.)
@Nobody-iy6tm "no actually"... You completely ignored my comment just to make some weird statements for yourself. Clearly this structure cannot hold infinite weight. That's pure and simple fact not matter how you want to talk around it. Objectively, the structure has a threshold at which it can no longer support.
So cool, I'm getting some sticks so I can show my children! It's a shame that a failure of part is a failure of the whole, no redundancy, but the ingenuity is off the charts.
What is the longest Da Vinci's Self Supporting Bridge you've heard of? Grok The most famous version of Leonardo da Vinci's self-supporting bridge is the proposal he made in 1502 to Sultan Bayezid II of Constantinople (present-day Istanbul) to span the Golden Horn. This bridge was designed to be 240 meters long and 24 meters wide, which would have made it the longest bridge in the world if it had been built. It is also worth mentioning that a modern version of this design, called the Vebjørn Sand da Vinci Project, was built in Norway over the E18 highway in Ås, in 2001. This bridge is 109 meters long with a main span of 40 meters, making it a of the longest built according to Da Vinci's design principles.
So... to actually use this incredible, no nails, no fastenings bridge, all you have to do is fasten all the parts together with rope first. Or make a different bridge first to get to the other side so you can use this bridge. Wow, what an amazing invention.
The solution lies in twisting the bridge to cancel out the curvature. The minimal self-supporting & self-locking structure is the PENTAHELIX, that is a lateral frame expansion of the Tetrahelix
Set the supports on piles that rise out of the water. I think the Romans actually used this type of bridge on campaigns but they built a proper top deck.
I think the main interest from practical point is how to use them as scaffold, for building a stone arc or other structures. In that case, using ropes is not a bad idea, as both ropes and wooden bars are lightweight and can be assembled quickly.
They should use this on the parts of the Appalachian trail where small bridges were destroyed. This wouldn’t do much for cars and bikes, but it would be great for hikers on the trail.
This bridge model good for trap purpose. 5:43 If want to make it more steady maybe chain each poles of each junctions to make sure no pole edge or a log removed by accident.
I wouldn't so much say that the bridge design is "genius" as much as it is clever. It's load capacity depends entirely upon the bending strength of it's individual components. So, while relatively quick and easy to assemble, it's capacity is necessarily low. Perhaps sufficient for troops to pass. A genius design is a Truss. Securing great strength with very little mass. Not so easily assembled though!
The problem with this design is that there are stress points everywhere the posts touch each other and it's right in the middle of where you are trying to stay away from. Whereas the bow with hanging cords the stress is away from the centre but at the foundation but forbid the cords break.
I love this solution to "how to build a bridge": To build a bridge that spans the gap, just have a bridge to walk on to convey the supports of the bridge you're wanting to build. Didn't see it in the video? 4:16
The Chinese were building this type of bridge long before Leonardo was born. They called them woven bridges. Useful because they had no central supporting pillar that could be destroyed by floods.
I believe the solution to the problem of extending the Da Vinci bridge is to use Da Vinci bridges as rods, that is, to create a Da Vinci bridge made from individual Da Vinci bridges that are used as rods
This honestly looks like one of davinci's best inventions. Better than his helicopter, which had to wait many centuries for the internal combustion engine to be invented. This could actually have been used in his time. I'm surprised and almost disappointed that I've never seen this before.
It is a really good experiment, but the issue is if you are using different pencils for the experiment (not sizes) shapes, like circular shaped pencils will easily slip, etc. But note it will be hard to make with pencils only and if it is not working and the result is not a bridge it must be because of the versatility of the pencils and the bridge. You can add toothpicks to strengthen your bridge but eventually, the pencils are ok my model could hold up to around 4 kgs just with the pencils but that's not too much weight, if you want to make your model really strong you can strengthen the green pieces by choosing strong wood or strong pencils mentioned in (1:02) part of the video, there is a disadvantage in the bailey bridge too, Even though it is temporary and it is costs less. The metal is mostly copper. Copper can easily rust and eventually, cracks are spotted so the bridge collapses if weight is kept onto after excessive usage. So Bailey bridges have an advantage and disadvantages😄! Mr. Sabin, this is a really informative video and I liked your animation and construction module. Thanks for the experiment once again!!! Thanks Everyone!
You are using glue lam beams on your bridge. If you turn each beam 90 degrees on their long axis they will have much more dimensional stability forming a more rigid bridge.
Nice. Are they used to cross small rivers and creeks? They would be very useful in remote areas where rivers and creeks flood and become impassable. Why take the rope ties off?
It has 1 weakness: wood isn't a strong material and requires to be thick enough to hold heavier weight. Either a larger lumber or a much more dense wood such as lignum vitae as bare minimum.
We can use key and slot profile at the joining sections of two members to avoid slippage during high water flow but I see another that at the virtical deflection of the structure can't be determined in case of continuous varying load and the structure might get collapsed due to uneven loading at different points. Pls correct me if assumed incorrectly.😊
kind of like those Chinese finger locks you stick your fingers in and when you pull them out it tightens around them and your fingers won't come out,, I think I'm going to try to build some scaffolding like this and then use some structural strength so they don't, flip slip ,out,, would be kind of dumb and not put some boarded pathway to walk on across,, but that's not the point of it,, nice job ! (for sharing)
It just means it a intuitive invention. The Chinese had one of the longest lasting civil societies on earth. They've definitely made some major contributions, but they aren't special.
@thatotherguy7596 it's actually really sad to see the shell of what they were. The brightness and uniqueness of their culture. Their culture and respect for wisdom and honor. Its crazy how our world is now.
No shade at DaVinci, but haven't Japanese engineers been building full scale permanent working versions of this exact design for centuries? This video makes it seem like it's some kind of crazy bridge concept invented by a European that might work some day, rather than the existing engineering marvel invented by Asians long ago that it actually is.
Hello everyone, I hope you enjoyed the brilliant thought process behind Da Vinci's self-supporting bridge. I’d be grateful if you could support my channel today at www.patreon.com/Sabins. Your support is crucial to making our educational services sustainable. Wishing you a happy Diwali! Thanks Sabin Mathew
If you want to educate people, maybe mention that China has making this sort of bridge since long before Da Vinci was born.
Thank you for your work, Sabin! I love watching these videos.
Have you considered public grants for funding? PBS and the
Thank you for the video! I love these. Please keep it up!
Hello Sabin, I love your channel and what you share. I'm a working Timber Wright and have built several of these types of bridges over the years. I've never been sure why they get called a "Da Vinci" bridge since the Chinese Scholar Lu Ban (魯班) was the first I've known of to employ a "stitch bridge" almost a thousand years before Da Vinci even lived. Some to these did span further and at a lower angle. Though made of stone, the Anji Bridge (安濟橋;) during construction employed these very same timber joinery systems and understanding, and still centuries before Da Vinci...Thanks again for what you and your team share and do with your videos...
Can you make a video on how HPLC works?
Honestly out of all your practical demonstrations I've seen this was the best, fantastic work with this one!
Nice username
How is it practical? It seems like a terrible bridge design
I used this bridge to mend the relationship w my Dad, he abondoned me at 6yrs old. Thank you Da Vinci.
Thank ancient China.
@@AlbertaGeek What are you trying to say, that Da Vinci stole that idea for a bridge from Chinese? Even if there was such a thing in China that was unknown in Europe, so Da Vinci invented it (again).
@@ozymandiasultor9480 I would not say "stole", but more than silk travelled along the silk road. Knowledge travels, too you know.
Could he have "invented" it independently? Sure, why not? After all, I did so myself, as a Cub Scout during the early 70s, going for my 'Building' badge. It was a popsicle stick bridge that I deduced from that popsicle stick construction that would explode when you flung it at something (or someone). Pardon my nostalgia.
Dont think he left you. He left your mother.
Weird..but I'm happy for you, I guess?
When I saw the animation I was skeptical, but then you literally built it on your office, that's why your channel is amazing.
Da Vinci was a genius with everything he put his hand to. Thank you for this video.👍
Da Vinci is a great scientist and artist. However this is not his invention. This kind of bridge already exists in 11 century.
Thank you for very interesting physical experiments.
You are welcome :)
As an assistant professor teaching engineering students, I love sharing your videos with my class and discussing them together. I can hardly describe the excitement it brings to the students!
A bridge where every point is literally a critical point.
I wonder why troops didn’t use it? 😂
Ohh no, it's a stable and rugged bridge. Our simple pencil bridge was able to carry more than 1 k.g of weight. The bridge had no problem, irrespective of the point or angle of load application. One thing is clear. This bridge will never fail because of the joint issue. More the force you apply the stronger the joints become. Yah, of couse if any of the members of this bridge fails, the entire bridge will collapse at once.
@@SabinCivil
Schrödingers Bridge
Such a cool video with a mix of animations, practical demos, and history examples!!!!
I used this bridge to escape from North Korea to China. Thank you Da Vinci.
Thank China for the bridge. They've been making it for over a thousand years.
Damn, from super totalitarian regime, to just totalitarian regime. Congratulatioms still 🎉
You're walking straight into a catapult aiming for north korea lmao
Awesome!
How did you hear about this bridge in NK? Seems like that kind of info. would be strictly monitored in a place like NK.
The Chinese built a bridge - using the same general idea of interlocking timbers - about 300 years before DaVinci was born. It was called the Rainbow bridge and it is an equally fascinating early engineering feat.
Thank you again for your work, finally a channel with substance instead of meaningless "content"
3:15 there's a ghost standing behind him
It's Snoop Dogg ig
This is fascinating!✨ Exploring the genius behind its design is such a treat-his ability to merge functionality and beauty is unmatched. Thanks for taking us on this magical journey through history! 🔍🎨
Although da Vinci is often given credit for this, the Chinese Emperors were building bridges like this a good period prior; some of it had to do with seasonal flooding problems that often took out small to medium sized bridges- the Emperor kept an inventory of these parts, these logs, and shipped them to where ever they were needed. First they were erected , then spanned, followed by a more reasonably sloped on side and off side to anchor it and make it usable.
I believe the Chinese used this bridge well before day Vinci. It was known to them as the Rainbow bridge. Some research may confirm or deny this.
Chinese craftman named Lu Ban
This type of simple practical thing are generally like this.
Many other people also invented this but the one who introduce it better to rest of the world gets the credit
Such as
Pythagorean theorem
Zero
I have known about this bridge for some time and have experimented with various iterations of it.
Everyone looks upon it as an arch bridge and for that it is brilliant.
One thing I tried, is to build it upside down i.e. an inverted arch.
As an inverted arch it can be rocked on the arch provided that each end is kept loaded toward the ground. To a limited extent it can be used to lower a load over a gap. As a form of crane
Extending it is easy and can be done very quickly as the outer end is held in place by gravity so no need to support.
Limited by the strength of the first beams as the load on them increase exponentially if pivoted at or close to the end
Good Sir, how about merging the da Vinci bridge with the tensegrity bridge design... I think both design fits so well...
I appreciate your consistent efforts and your ability to simplify complex topics. As an Indian, I feel proud! 🇮🇳
5:49 just use curved sticks to make the bridge way longer without increasing the stick size
Friction won't be effective enough
@ doubt it, but if needed straighten them at the needed part
Very interesting. This could be used for a number of interesting applications honestly.
The only way I can see it used in it's bridge form to lengthen it besides using it in those manners would be to try to interlock them using maybe two half circles. I would have to test on smaller scale.
It seems it has a lot of potential outside of bridge use though.
For example, it seems it would be advantageous in survival scenarios to know how to create this bridge, or use cordage to create a full circle, turn it sideways, maybe stack a couple. It could give you a cylindrical shelter. There's a lot of potential with it. 😊
A good practical use is for putting up a survival shelter frame with little or no cordage.
Fascinating. Wish I had done that for my Grade 8 science project. Thanks for posting.
To be honest you're idea was good, all we need to do is to keep that in place by adding something to each joint or to the whole structure, to prevent it from being pushed by the current cover it in a net like cover to let the water pass through but keep the thing intact.
I work at a local brewery and we have a footbridge in the outdoor area. It is engineered in this manner and I marvel at it all the time. It does have fasteners and is solid, but same design.
I know a compromise solution to the last problem: suppose the issue is the weight the bridge would have to carry. We can put bars nailed together over the entire river that can carry at least one person at a time. The person goes on the unsupported Bars until it's about the middle of the River, then the person has to ram a support tower into the riverbed, from the upside of the bridge. Now you can bed two Da Vinci bridges onto the support in the middle of the river. Use strings to support the horizontal bars. How exactly you get the support into the middle of the River is of less importance, you could use a boat aswell, once it's there you can save on many supports by using two or more Da Vinci bridges.
Impressive work with both animation and practicals
2:46 All the weight you apply will be transferred onto the density of the red pencils. They can also not be pulled outwards due to being inside a triangle; as soon as any one is removed it comes apart.*
Securitisation changes, in the office model the top piece is not in a triangle and spreads out the structure making a wider curve; also a lower bridge.
Remember those basic shapes, 2D is Hexagon.
good vid!
KEEP DOING WHAT YOU DOING WE LOVE YOUR RERUNS OF THE PAST.
The Japanese have been building “DaVinci” bridges for centuries before DaVinci was born. Some are still standing today.
Thing
Thing comma Japan
1:40 “I am able to climb this bridge, with almost difficulty”
aistructuralreview AI fixes this. Exploring Da Vinci's Self-Supporting Bridge
Thanks sir because of you genius people, engineering students and professionals are coming with new thoughts in their domain❤
you are the best, these videos are the best, you are a wizard in disguise!
An airless tires would be a great idea using sticks wrapped in a rubber or some durable coverings or something to keep everything in place
Trying this out yourself with simple pens & pencils will FUCK YOU UP GOOD
Why doesn’t it work with pencils
I think if we least use more heavy weight products like concrete or iron type with geometry shape might work as the water flow will not be able to cause that much pressure on it when flow increases.
on the last drawing, you could place two parallel arc bridges on the same direction as the river flow, and then place another 3 arc bridges connecting these 2 arcs and the shores.
That's a really smart solution, pretty sure mine is worse.
Great simple and understandable explanation...
Davinci was almost as smart as me which is quite remarkable.
Sabin stop posting under aliases
@Larry26-f1w crabbinsabin was already taken
Da Vinci born in 1452 - 1519 and this bridge is fantastic job. Please see China's Craftsman named Lu Ban. He born in 507 BC - 444 BC. He has a same creative self support bridge too.
Looks like an excellent method to erect an early arc intending to build a stone bridge. Thank you for the interesting video 👍
0:12 incorrect. There is a threshold of weight at which the structure cannot longer support. It is not possible to put infinite weight on the structure. There is a point at which the weight will not only weaken, it will deconstruct the structure.
Actually the construction is one of the methods to build an arch.
Stress of materials can be loaded in a) compression, b) tension, c) shear.
Stone and other materials are usually strong against compression, and less strong against tension and shear. Half circle ach is designed in a way that materials are compressed, which make the construction very stable.
The Leonardo self supporting bridge is excellent construction when building a stable bridge with least materials.
Another method would require huge amount of woods, but we can also build classic arch out of woods, in which woods are just compressed. The construction would then far more stronger than Leonardo self supporting bridge, while it is also self supporting. (We cannot build stable circle, though.)
@Nobody-iy6tm "no actually"...
You completely ignored my comment just to make some weird statements for yourself.
Clearly this structure cannot hold infinite weight. That's pure and simple fact not matter how you want to talk around it. Objectively, the structure has a threshold at which it can no longer support.
So cool, I'm getting some sticks so I can show my children! It's a shame that a failure of part is a failure of the whole, no redundancy, but the ingenuity is off the charts.
What a Great video
What is the longest Da Vinci's Self Supporting Bridge you've heard of?
Grok
The most famous version of Leonardo da Vinci's self-supporting bridge is the proposal he made in 1502 to Sultan Bayezid II of Constantinople (present-day Istanbul) to span the Golden Horn. This bridge was designed to be 240 meters long and 24 meters wide, which would have made it the longest bridge in the world if it had been built.
It is also worth mentioning that a modern version of this design, called the Vebjørn Sand da Vinci Project, was built in Norway over the E18 highway in Ås, in 2001. This bridge is 109 meters long with a main span of 40 meters, making it a of the longest built according to Da Vinci's design principles.
It appears to be a bridge not only through space but also over time: from the Renaissance to Ancient Rome. Impressive!
So... to actually use this incredible, no nails, no fastenings bridge, all you have to do is fasten all the parts together with rope first.
Or make a different bridge first to get to the other side so you can use this bridge.
Wow, what an amazing invention.
The solution lies in twisting the bridge to cancel out the curvature. The minimal self-supporting & self-locking structure is the PENTAHELIX, that is a lateral frame expansion of the Tetrahelix
Set the supports on piles that rise out of the water. I think the Romans actually used this type of bridge on campaigns but they built a proper top deck.
I think the main interest from practical point is how to use them as scaffold, for building a stone arc or other structures. In that case, using ropes is not a bad idea, as both ropes and wooden bars are lightweight and can be assembled quickly.
Hello, watching from Phillipines ❤❤❤
Very cool! thank you for explaining traditional wisdom
They should use this on the parts of the Appalachian trail where small bridges were destroyed. This wouldn’t do much for cars and bikes, but it would be great for hikers on the trail.
Wow really amazing explanation ❤❤
this is insane yet practical
So cool! I never heard of this- thanks for sharing!
idea:make one out of metal filiments that interlock with magnets to from interlocking davichi circles to make a material
The other advantage of the Bailey bridge is that it is flat, making it much easier to walk across and move rolling stock.
That demonstration was cool
This bridge model good for trap purpose. 5:43 If want to make it more steady maybe chain each poles of each junctions to make sure no pole edge or a log removed by accident.
Nice one Anthony keidis 🤘😎
I wouldn't so much say that the bridge design is "genius" as much as it is clever. It's load capacity depends entirely upon the bending strength of it's individual components. So, while relatively quick and easy to assemble, it's capacity is necessarily low. Perhaps sufficient for troops to pass. A genius design is a Truss. Securing great strength with very little mass. Not so easily assembled though!
To address the underwater solution, building the bridge with steel and then welding them together should provide a stable base.
Very nice explanation 👍🏻
The problem with this design is that there are stress points everywhere the posts touch each other and it's right in the middle of where you are trying to stay away from. Whereas the bow with hanging cords the stress is away from the centre but at the foundation but forbid the cords break.
Amazing video, thanks!
I love this solution to "how to build a bridge": To build a bridge that spans the gap, just have a bridge to walk on to convey the supports of the bridge you're wanting to build.
Didn't see it in the video? 4:16
The Chinese were building this type of bridge long before Leonardo was born. They called them woven bridges. Useful because they had no central supporting pillar that could be destroyed by floods.
Those troops crossing over the bridge look like a very ferocious troops 😂
I believe the solution to the problem of extending the Da Vinci bridge is to use Da Vinci bridges as rods, that is, to create a Da Vinci bridge made from individual Da Vinci bridges that are used as rods
DaVinci is a all rounder man
ubermensch
Great video.👍
Many thanks
This honestly looks like one of davinci's best inventions. Better than his helicopter, which had to wait many centuries for the internal combustion engine to be invented. This could actually have been used in his time. I'm surprised and almost disappointed that I've never seen this before.
You are amazing
Please make a vedio about working a camera
If you want to try yourself you can build one with chop sticks. Surprisingly sturdy 👍
These sticks reminded me about Dolores Umbridge, thanks Da Vinci
It is a really good experiment, but the issue is if you are using different pencils for the experiment (not sizes) shapes, like circular shaped pencils will easily slip, etc. But note it will be hard to make with pencils only and if it is not working and the result is not a bridge it must be because of the versatility of the pencils and the bridge. You can add toothpicks to strengthen your bridge but eventually, the pencils are ok my model could hold up to around 4 kgs just with the pencils but that's not too much weight, if you want to make your model really strong you can strengthen the green pieces by choosing strong wood or strong pencils mentioned in (1:02) part of the video, there is a disadvantage in the bailey bridge too, Even though it is temporary and it is costs less. The metal is mostly copper. Copper can easily rust and eventually, cracks are spotted so the bridge collapses if weight is kept onto after excessive usage. So Bailey bridges have an advantage and disadvantages😄! Mr. Sabin, this is a really informative video and I liked your animation and construction module. Thanks for the experiment once again!!! Thanks Everyone!
I saw something like this in a video about a famous bridge in China. I can't remember the details, but it was earthquake proof.
Place the divinci bridge upside-down so the weakest points are above water and the strongest part of the arch os still supporting all the weight.
Excellent!
You are using glue lam beams on your bridge. If you turn each beam 90 degrees on their long axis they will have much more dimensional stability forming a more rigid bridge.
joints across could be tightened with screw and cementation could also be done across joints in river bed
The definition of genius is da Vinci
Nice. Are they used to cross small rivers and creeks? They would be very useful in remote areas where rivers and creeks flood and become impassable.
Why take the rope ties off?
It has 1 weakness: wood isn't a strong material and requires to be thick enough to hold heavier weight. Either a larger lumber or a much more dense wood such as lignum vitae as bare minimum.
We can use key and slot profile at the joining sections of two members to avoid slippage during high water flow but I see another that at the virtical deflection of the structure can't be determined in case of continuous varying load and the structure might get collapsed due to uneven loading at different points. Pls correct me if assumed incorrectly.😊
Great video 👌
I didn’t know dumbbells was so perfect shaped that times.
Great video
kind of like those Chinese finger locks you stick your fingers in and when you pull them out it tightens around them and your fingers won't come out,, I think I'm going to try to build some scaffolding like this and then use some structural strength so they don't, flip slip ,out,, would be kind of dumb and not put some boarded pathway to walk on across,, but that's not the point of it,, nice job ! (for sharing)
At 2:10 we see a real collapse which Sabin failed to show in his WTC videos . ( 3000 missing bodies say this is so ! )
The Chinese invented this type of construction long before DaVinci came up with it.
It just means it a intuitive invention. The Chinese had one of the longest lasting civil societies on earth. They've definitely made some major contributions, but they aren't special.
@@jaywatrous3805 The Chinese were very special in their own way for a long time. Now they're just kind of nuts.
@thatotherguy7596 it's actually really sad to see the shell of what they were. The brightness and uniqueness of their culture. Their culture and respect for wisdom and honor. Its crazy how our world is now.
@@jaywatrous3805 Agreed.
Please discuss the construction of a super bridge in China
No shade at DaVinci, but haven't Japanese engineers been building full scale permanent working versions of this exact design for centuries?
This video makes it seem like it's some kind of crazy bridge concept invented by a European that might work some day, rather than the existing engineering marvel invented by Asians long ago that it actually is.
Cool Video
This is just like a better version of tensigrity structures
Using the bridge as an over arch... Basically a suspension bridge of sorts... The only problem is the middle joint is able to rotate...
"Why don't we use this today?" probably because we don't want our bridges to be so easily destroyed? Any one beam failure will collapse it.
If you used pieces that zigzag, you could make this bridge even straight.
Half circles could extend the bridge. Or connecting it like a sinus curve.